The 10m Incremental Shuttle Walk Test is a Highly Reliable Field Exercise Test for Patients Referred to Cardiac Rehabilitation: a Retest Reliability Study

Objectives: To determine the retest reliability of the 10m incremental shuttle walk test (ISWT) in a mixed cardiac rehabilitation population.

Design: Participants completed two 10m ISWTs in a single session in a repeated measures study. Ten participants completed a third 10m ISWT as part of a pilot study.

Setting: Hospital physiotherapy department.

Participants: 62 adults aged a mean of 68 years (SD 10) referred to a cardiac rehabilitation program.

Main Outcome Measures: Retest reliability of the 10m ISWT expressed as relative reliability and measurement error. Relative reliability was expressed in a ratio in the form of an intraclass correlation coefficient (ICC) and measurement error in the form of the standard error of measurement (SEM) and 95% confidence intervals for the group and individual.

Results: There was a high level of relative reliability over the two walks with an ICC of .99. The SEMagreement was 17m, and a change of at least 23m for the group and 54m for the individual would be required to be 95% confident of exceeding measurement error.

Conclusions: The 10m ISWT demonstrated good retest reliability and is sufficiently reliable to be applied in practice in this population without the use of a practice test.